Premium Material: Our bite valve replacement is made of high-quality silicone material, safe and BPA free, which makes it an ideal mouthpiece replacement for your water bottle. (Note: rinse it with water and dry it before use, will make it more convenient for you to use.) Easy to Use: Twist the bite valve to the left or right and push down from top to bottom, and push the new bite valve replacement up to outside after cleaning. Leakproof: These bite valve replacements adopt a one-piece and self-seal design to prevent leakage, with an accurate size that fits the water bottle well and makes your bottle more long lasting. Wide Application: Compatible with Brita filter water bottles series, including its 32oz, 20oz stainless steel water filter bottle and its 36oz, 26oz plastic water filter bottle. Any reference to 'Brita' is for compatibility only; the product is not sponsored or endorsed by, or affiliated with the brands it fits.